These are very good amounts of money, and they add up! I recommend you steal from the Vegetable stall until 60 thieving, seeing as it gives a larger amount of experience than the Silver stall and the Silk stall.

If your patient enough, you'll have well over 100m after you've reached 99 thieving!

Congratulations! You now have quite a good amount of money AND 99 thieving. Skill cape time ftw.